Hi Ufuk,
Let's walk through this one problem at a time.
Regarding the first problem (smart banner not covering entire width, and bottom banner works fine), do you always see it in landscape mode, or does it also happen in portrait mode?
As per the documentation (which you linked), if a smart banner doesn't consume the full width, the banner should be centered and the remaining space should be filled with textile graphics. For next time, could you get us a Charles log for when you see this (and the others you reported) issue?
Vu Chau
Mobile Ads SDK Team